Results from Mass/Energy Balances:

Overall	Ws=Qc+QH
Evaporator	m=Qc/(H1-H4)
Compressor	Ws=m(H1-H2)
Valve

These four equations will lead to finding out m, QH, Ws, and x. However, first we must find the enthalpies using a Pressure-Enthalpy diagram for ethylene.

 Once the enthalpies are found, finding m, QH, Ws, and x becomes a matter of simple algebra. 

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